I have also read replies from different corners that it is impossible to learn. It is possible BUT depends upon the TEACHER on which pattern he take start and complete it alongwith students. students response actually is very important for encouragement of the teacher. I request to all students of all in different fields of knowledge that they ever quick response to the teacher for their encouragements. I pay special THANKS to all teachers in advance to keep it up their knowledge sharing with best their tries for better of the students.